Palatine tonsil get easily
affected causing tonsilitisor a more serious variety of
peritonsillar abscess (Quinsy). Also pharyngeal tonsil may become
inflammed in children causing adenoids.

Appendicitis is a good
example of what can go wrong with the lymphatic system. When the lymphatic
nodules swell in the mucosa of appendix, they help to block the
appendicular lumen leading to stasis of fluid and overgrowth of bacteria.

This acute or subacute (or in
deed chronic) infection of the vermiform appendix is in most cases triggered
off by blockage of its very small lumen by fecolith, tumor, worms or
calculus, leading to stasis and bacterial overgrowth after ischemia. It
involves an acute phase neutrophil exudate and congestion of subserosal
vessels. Its chronic state may lead to abscess formation.